A
B
C
D
1.( ) is spread by direct contact with an infected person’s blood.A、Hepatitis AB、Hepatitis BC、Hepatitis CD、None of above
2.(74)A.AB.BC.CD.D
3.铰链四杆机构ABCD,如果以BC为机架(静件),当机构为双曲柄机构时,各杆的长度可为()。A、AB=130 BC=150 CD=175 AD=200B、AB=150 BC=130 CD=165 AD=200C、AB=175 BC=130 CD=185 AD=200D、AB=200 BC=150 CD=165 AD=130
4.Infection with ( ) can cause chronic liver disease.A、Hepatitis AB、Hepatitis BC、Hepatitis CD、None of above
第1题: